Bosch Starter Motor 24V 9 Tooth CW Part No. 1986S10104

Bosch starter motor for heavy commercial applications, rated at 24V and supplied as a 9 tooth clockwise unit. The listed part number is 1986S10104, which is the clearest reference to use when checking replacement suitability against the original starter.

This starter is configured with a 3 hole mount, 3 mounting bores, 127mm mount centres A, 90mm mount centres B, and 90mm mount centres C. The flange diameter is 89mm, the overall length is 341mm, the pinion diameter is 35mm, and the pinion at rest measures 48mm.

The unit is identified as a dry type starter motor and is supplied individually as each. It carries a 12 month warranty, is manufactured in China, and is listed under Bosch rotating electrical and starter motors product groups.

Key Features

• 24V heavy commercial starter motor
• 9 tooth clockwise rotation
• 3 hole mount with 3 mounting bores
• Part No. 1986S10104
• 12 month warranty
• Designed in fit and performance to meet OE starters

Specifications

• Brand: Bosch
• Type: Starter motor heavy commercial
• Voltage: 24V
• Rotation: CW
• Number of teeth: 9
• Starter mount type: 3 hole
• Number of mounting bores: 3
• Mount centres A: 127mm

Known fitment applications

• Volvo F7
• Volvo FL6

Application and Buying Notes

Before ordering, compare the part number 1986S10104 with the removed starter and check the physical mounting details. The important points here are the 24V electrical rating, 9 tooth clockwise rotation, 3 hole mount, 127mm mount centres A, 90mm mount centres B and C, and the 89mm flange diameter.

Measure the existing unit carefully if the original starter is not available. The overall length is 341mm, the pinion diameter is 35mm, and the pinion at rest is 48mm. Those dimensions help confirm the replacement matches the vehicle’s starter arrangement rather than relying on appearance alone.

This starter is listed for Volvo F7 and Volvo FL6 applications, and the supplied fitment preview includes Volvo F7 model years from 1978 through 1985 and Volvo FL6 model years from 1985 and 1986. Even with those application references, final confirmation should still be made against the part number, mounting pattern, and electrical specification on the vehicle.

Because starter assemblies can vary within the same model range, pay close attention to the number of mounting bores, mount centres, rotation direction, and whether the original unit is a dry type. These details are the practical checks that help avoid ordering the wrong unit when the vehicle model badge alone is not enough.

Before supply, the safest approach is to confirm the original unit details against the listed part number, voltage, output rating, mounting arrangement, and pulley configuration. That checking process is standard practice in the parts trade because visually similar units can still differ in service-critical ways.

For workshop, fleet, and equipment applications, accurate identification of part number 1986S10104 helps avoid unnecessary freight, additional labour, and vehicle or machine downtime. Where the application is not straightforward, the original unit, OEM reference, or workshop records should be used as the primary confirmation point.

Relevant published details for this unit include Type STARTER MOTOR HEAVY COMM, Unit of Measure EACH, Warranty 12 Months, Mount Centres A 127mm, Mount Centres C 90mm, Number of Teeth 9, Pinion at Rest 48mm, Rotation CW, Starter Mount Type 3 Hole, Number of mounting bores 3.

Additional published details for cross-checking include Packaging width 16, Manufactured in China, Product Group 2 STARTER MOTORS, Part No. 1986S10104, Brand BOSCH, Description Bosch Starter Motor 24V 9Th CW, Flange Diameter 89mm, Mount Centres B 90mm, Mount Hole Diameter 10.

Bosch Starter Motor 24V 9Th CW. Part number 1986S10104 should be checked first. Listed voltage is 24. These details form the core reference points used by parts interpreters when confirming the correct replacement.

For part number 1986S10104, the normal identification sequence is part number, electrical rating, mounting arrangement, connector or terminal style, and pulley or drive details. Using those checkpoints helps confirm that the listed unit matches the service requirement rather than only looking similar.

For a starter motor heavy comm in workshop, fleet, trade, agricultural, or construction service, the listed voltage 24 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include VOLVO F7, VOLVO F7 1978, VOLVO F7 1979, VOLVO F7 1980. Even with application listings, final confirmation should still be based on the exact unit being replaced and the service requirements of the vehicle or machine.

Compatibility note: Confirm compatibility using part number 1986S10104, the 24V rating, 9 tooth clockwise rotation, 3 hole mount, and the listed mount centres and dimensions before purchase.

FAQ

What is the part number for this Bosch starter motor?

The part number is 1986S10104. For this listing, part number 1986S10104 is the main reference point. Listed voltage is 24. Published fitment references include VOLVO F7, VOLVO F7 1978, VOLVO F7 1979. These details should still be checked against the original unit before ordering.

What voltage is this starter motor?

It is a 24V starter motor. For this listing, part number 1986S10104 is the main reference point. Listed voltage is 24. Published fitment references include VOLVO F7, VOLVO F7 1978, VOLVO F7 1979. These details should still be checked against the original unit before ordering.

How many teeth does the pinion have?

The starter has 9 teeth. For this listing, part number 1986S10104 is the main reference point. Listed voltage is 24. Published fitment references include VOLVO F7, VOLVO F7 1978, VOLVO F7 1979. These details should still be checked against the original unit before ordering.

What rotation does this starter use?

It is clockwise rotation, listed as CW. For this listing, part number 1986S10104 is the main reference point. Listed voltage is 24. Published fitment references include VOLVO F7, VOLVO F7 1978, VOLVO F7 1979. These details should still be checked against the original unit before ordering.

What vehicles are listed for fitment?

The supplied fitment references include Volvo F7 and Volvo FL6, with previewed Volvo F7 model years from 1978 to 1985 and Volvo FL6 model years from 1985 and 1986. For this listing, part number 1986S10104 is the main reference point. Listed voltage is 24. Published fitment references include VOLVO F7, VOLVO F7 1978, VOLVO F7 1979. These details should still be checked against the original unit before ordering.

What should I check before ordering?

Check the part number 1986S10104, 24V rating, 9 tooth CW rotation, 3 hole mount, mount centres, flange diameter, and overall dimensions against the original unit. For this listing, part number 1986S10104 is the main reference point. Listed voltage is 24. Published fitment references include VOLVO F7, VOLVO F7 1978, VOLVO F7 1979. These details should still be checked against the original unit before ordering.